The North Face Furnace 20 Sleeping Bag

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This down-insulated sleeping bag has a less-tapered cut than a standard backpacking mummy bag, giving you more room to move around on your spring, summer and fall adventures.

  • Features

    • With a European Norm (EN) lower-limit rating of 20°F, the Furnace 20 is a versatile bag for 3-season backpacking adventures when temps might dip below freezing
    • 550-fill-power ProDown™ natural goose down insulation is light and lofty
    • ProDown™ is enhanced with a hydrophobic finish that improves warmth by allowing it to dry faster and repel moisture up to 10x longer than untreated down
    • Anti-compression pads made from Heatseeker™ Eco synthetic insulation are sewn into high-pressure areas that contact the ground to create an insulating buffer
    • Shaped hood and down-insulated draft collar hold in warmth
    • Insulated draft tube backs the zipper to prevent warm air from escaping; antisnag tape keeps the zipper from catching on the draft tube
    • 3/4-length, 2-way zipper lets you make adjustments for ventilation
    • Comfort-oriented shape has a less-tapered cut than some backpacking sleeping bags, allowing you more room to move around
    • Footbox allows natural foot movement while also eliminating excess lateral space so you stay warm and comfortable all night long
    • The North Face Furnace 20 Sleeping Bag comes with a standard stuff sack


    Many sleeping bags are rated for temperature by an independent testing protocol. REI and the broader industry now use the International Organization for Standardization (ISO) 23537 protocol, which improves on the older European Norm (EN) 13537 standard; you may still see older items in our assortment that were only EN tested. With either protocol, each bag gets a Comfort (or T-Comfort) rating and Lower Limit (or T-Limit) rating. The Comfort rating is the lowest temperature at which the bag will keep the average "cold sleeper" comfortable, and the Lower Limit rating is the lowest temperature at which the bag will keep the average "warm sleeper" comfortable. Ratings are based on a person wearing one long underwear layer and a pair of socks, sleeping on an insulated surface with a minimum R-value of 5.38. Many brands use the Comfort rating for women's bags and the Lower Limit rating for men's and unisex bags. Everyone's body and sleep comfort differ, and conditions of use (posture, clothing, sleeping pad R-value, wind, humidity, etc.) affect total insulation, so EN and ISO ratings are intended as a guideline to help you compare products, rather than a guarantee of warmth.
    View all The North Face Men's Sleeping Bags
  • Technical Specs

    Best Use


    Tested Lower Limit

    20 degrees (F) - EN

    Tested Comfort

    34 degrees (F) - EN

    Temperature Rating (F)

    20 degrees (F)

    Temperature Rating (C)

    -7 degrees (C)



    Zipper Location


    Insulation Type


    Water-Resistant Down



    550-fill goose down



    Sleeping Bag Shape


    Stuff Sack Size

    9 x 17 inches

    Stuff Sack Volume

    20 liters

    Compressed Volume

    6.6 liters



  • Reviews
    38 reviews with an average rating of 4.6 out of 5 stars

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